Exam 16: Cell Walls, the Extracellular Matrix, and Cell Interactions

A mutation in the bacterial gene encoding crescentin would likely have an effect on which type of bacteria?

The junctions between animal cells that allow the free passage of molecules smaller than approximately 1000 daltons are called

The direction of cellulose microfibril synthesis in elongating plant cells is

Plasmodesmata contain a single microtubule running from cell to cell down their center.

Loss of E-cadherin can lead to the development of a cancer.

Describe two ways in which a hemidesmosome differs from a desmosome.

How do the hexagonal units of connexin form a junction through which molecules can diffuse?

The hydroxyl groups on the modified amino acids of collagen form _______ that stabilize the collagen triple helix.

What is the function of gap junctions in heart muscle?

Gap junctions between nerve cells form _______ synapses.

Collagens commonly contain the three repeating amino acids: proline,

Hemidesmosomes link intermediate filaments inside intestinal epithelial cells to the basal lamina, an organized zone of extracellular matrix that underlies the intestinal epithelium. What is the advantage of this to a flexible tissue?

The function of gap junctions is to

Adherens junctions are linked to cytoplasmic

Cell adhesion molecules can be divided into four major groups. Which of the following is not one of those groups?

Specific recognition between cell types such as leukocytes and endothelial cells of blood vessels is mediated by cell-surface glycoproteins called

What are the three most common disease consequences of connexin gene mutations?

Fibrous structural proteins of the extracellular matrix are embedded in gels formed from polysaccharides called

What is a secondary function of tight junctions?

Integrins are